Gasket with passageway and vacuum blade for introducing air into barrel of carburetor

ABSTRACT

A gasket body formed with an opening disposed in registration with the bore of a carburetor barrel so that the fuel mixture will pass therethrough on its way to an intake manifold, the gasket body having an air inlet passageway leading from a source of air to the gasket opening and through which additional air may be conveyed to the carburetor for intermixing with the fuel mixture for leaning down the air-fuel ratio, and a vacuum blade projects into the gasket body opening and arranged to create a vacuum in the air inlet passageway for drawing in the additional air.

United States Patent Busse Feb. 22, 1972 [541 GASKET WITH PASSAGEWAY ANDVACUUM BLADE FOR INTRODUCING AIR INTO BARREL OF CARBURETOR 211 Appl.No.: 27,005

3,186,691 6/1965 Manning,Jr........ ....l23/127X 3,262,437 7/1966Bradshaw 123/1 19 A 3,435,810 4/1969 Busse ....123/1 19 A 3,492,9802/1970 Beck ..123/1 19 A FOREIGN PATENTS OR APPLICATIONS 454,001 l/1950Italy ..123/1l9 D Primary Examiner-Wendell E. Burns Attorney-Joseph F.Cole 57] ABSTRACT A gasket body formed with an opening disposed inregistration with the bore of a carburetor barrel so that the fuelmixture will pass therethrough on its way to an intake manifold, thegasket body having an air inlet passageway leading from a source of airto the gasket opening and through which additional air may be conveyedto the carburetor for intermixing with the fuel mixture for leaning downthe air-fuel ratio, and a vacuum blade projects into the gasket bodyopening and arranged to create a vacuum in the air inlet passageway fordrawing in the additional air.

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PATENT No.

INVENTOR.

EWALD A- Busse AT TORNEY PATENTEDFEBZZ I972 3, 643 641 SHEET 2 [)F 3 I IV/A HJ m- 29 26 I1 [32. 5- INVENTOR -EWAL D A-.BUSSE a crew AT TORNEYPATENTEUFEBZZ m2 SHEET 3 BF 3 I113; El-

INVENTOR.

EwAL. D A- BussE PATEN '1' NO- ATTORNEY GASKET WITII PASSAGEWAY ANDVACUUM BLADE FOR INTRODUCING AIR INTO BARREL F CARBURETOR In my US. Pat.No. 3,435,8l0 there is disclosed an apparatus for separating the heavierand lighter components of exhaust gases from one another by centrifugalforce, and these lighter components are conveyed to the internalcombustion to augment the fuel mixture from the carburetor. After theunburned hydrocarbon compounds are returned to the engine, additionalair is required to reduce the reading of carbon monoxide to a pointwhere the formation of smog is substantially prevented.

My present invention is designed to perform the duty of leaning down themixed air-fuel ratio of the carburetor without changing the jet sizes ofthe carburetor in the primary (low speed) section by providing an airinlet passageway that will supply additional air to the carburetor, andfurther having a vacuum blade arranged to create a vacuum in thispassageway for drawing air from a suitable source into the carburetor,providing the necessary leaning down of the mixed air-fuel ratio. Thisadditional air is required to substantially reduce the carbon monoxidereading at idle speed of the engine, after the unburned hydrocarboncompounds have been returned to the engine and substantially preventingformation of smog.

Other objects and advantages will appear as the specification proceeds,and the novel features of the invention will be set forth in theappended claims.

BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of theinvention, reference should be made to the accompanying drawings, inwhich:

FIG. 1 is an elevational view of a carburetor, partly in section, andillustrating my gasket with passageway and vacuum blade for introducingair into the barrel of the carburetor, the additional air being suppliedby the high-speed barrel, the operating mechanism for the several valvesbeing omitted;

FIG. 2 is a plan view of the gasket with passageway and vacuum blade forintroducing air into the barrel ofthe carburetor, as seen from thehorizontal plane 2-2 in FIG. 1;

FIG. 3 is a sectional view taken along the plane 3-3 of FIG. 2, thegasket being shown as being laminated in three layers;

FIG. 4 is a plan view of the lower layer of the laminated gasket, asseen from the plane 44 of FIG. 3;

FIG. 5 is a sectional view similar to FIG. 3, but disclosing the gasketas being formed in a unitary structure;

FIG. 6 is an elevational view, partly in section, and being similar toFIG. 1, but showing the additional air being supplied from an airfilter; and

FIG. 7 is a horizontal sectional view taken along the plane 7-7 of FIG.6.

While I have shown only the preferred embodiments of the invention, itshould be understood that various changes, or modifications, may be madewithin the scope of the appended claims without departing from thespirit thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to thedrawings in detail, it will be noted that FIG. 1 illustrates acarburetor A of the downdraft type having an air filter B mounted on thetop thereof, and an intake manifold C arranged under the carburetor. Thecarburetor A has a pair of low-speed barrels l0 and a pair of high-speedbarrels 11; however, it should be made clear that carburetors of thesingle barrel or two barrel types may be used as far as this inventionis concerned.

As disclosed in FIG. 1, a choke valve 12 has been shown in the upperportion of the low-speed barrel I0, and a gas-feed jet 13 is arranged inthe venturi throat 14 of this barrel. Likewise, the high-speed barrel 1]has a gas-feed jet 15 disposed in its venturi throat 16. Moreover, thebarrel 11 is provided with a vacuum air valve 17 disposed below the jet15, and this valve is opened by a vacuum in the intake manifold C.

The carburetor A defines a main body 18 having a throttle valve assemblybody'l9 removably secured thereunder, and

this body 19 is provided with a low-speed throttle valve 20 and ahigh-speedthrottle valve 21. It is well known that the throttle valve 20opens first, and a mixture of gas and air is fed downwardly through thelow-speed barrel 10 from idling to about half speed. At this time, thehigh-speed valve 21 is closed. After the car reaches the higher speeds,the throttle valve 21 opens and additional fuel mixture is drawn intothe manifold C. At this time the low-speed throttle valve 20 remainsopen.

The control mechanisms for opening and closing the valves 12, 20 and 21is well known in the art and has been omitted accordingly from thedrawings.

In the first embodiment of the invention, as shown in FIGS. 1 to4,'inclusive, it will be observed that a gasket D is disposedhorizontally and interposed between the carburetor body 18 and thethrottle valve assembly 19. This gasket has a gasket body formed with apair of openings 22 disposed in registration with the bores 23 of thelow-speed barrels 10. Moreover, the gasket body has a pair of largeropenings 24 registering with the bores 25 of the high-speed barrels 11.The fuel mixture will pass through the openings 22 and 25 on its way tothe intake manifold C.

The body of the gasket D has a pair of air inlet passageways 26 leadingfrom a source of air to the gasket openings 22 and through whichadditional air may be conveyed to the carburetor A for intermixing withthe fuel mixture for leaning down the mixed air-fuelratio. Vacuum blades27 are provided on the gasket body adjacent to and above the air inletpassageways 26,the blades defining tips projecting into the gasket bodyopenings 22, as shown in FIGS. 1-3, the blades being disposedhorizontally so that the fuel mixture flowing over the blades asindicated by the arrows 28 will create a vacuum in the air inletpassageways for drawing additional air into the carburetor, as suggestedbythe arrows 29. As shown in FIGS. 1 and 2, the blades 27 are flat andwider than the passageways26 and the latter are thinner than wide sothat the vacuum created will spread the indrawn air across the bore ofthe carburetor barrel 10.

It will be apparent from FIG. 1 that this additional air is provided bythe high-speed barrels 11. When the car is operating on the low-speedbarrels 10 only, the additional air is drawn into these barrels from thehigh-speed barrels 11 to further lean down the-fuel-air ration of thelow-speed barrels 10 to prevent or-materially reduce formation of carbonmonoxide and excessive hydrocarbons, when the fuel mixture explodes inthe cylinders of the engine.

In FIG. 1, there is shown the legend Patent No. 3,435,810" with an arrow30 leading from the legend to a fitting 31 connected to the manifold C.As shown in detail in'this patent as identified above, an apparatus isprovided for separating lighter components in exhaust gases from heaviercomponents, and conveying these lighter components back to the engine.It is these returned components that require the additional air toreduce the carbon monoxide readings at idle-speed of the engine andprevent the formation of smog.

As clearly shown in FIG. 3, the gasket D is laminated in three layers,the upper layer 32 being a sealing gasket, the intermediate layer 33preferably being made of metal and carrying'the vacuum blades 27, andthe lower layer 34 being made of material fonning a sealing gasket andbeing fonned with the air inlet passageways 26 therein.

The gasket D illustrated in FIG. 5 is the same as that shown in FIG. 3,with the exception that it is made in a unitary structure, for instance,made of plastic or relatively soft metal so that it will seal againstthe carburetor body 18 and the intake manifold C. Like referencenumerals have been applied to corresponding parts of FIGS. 3 and 5.

Turning now-to the modification shown in FIGS. 6 and 7, the carburetorA, air filter B and the intake manifold C are identical withthoseillustrated in FIG. I, and like reference numerals have been used todesignate corresponding parts.

(MA MIH However, the gasket D shown in FIGS. 6 and 7 has its air inletpassageways 26' connected by tubes 35 leading to the air filter B,whereby the additional air is supplied by the air filter.

In FIG. 7, only two of the air inlet passageways 26' have tubes 35connected thereto, while the remaining air inlet passageways 26acommunicate directly with the atmosphere surrounding the carburetor A.Otherwise, the construction of the gasket D is the same as the gasket Dand, of course, may be the same as the gasket D When a carburetor of thedowndraft type is used, as in FIGS. 1 and 6, the air inlet passageways26, 26', 26a in the gasket body are located directly below the vacuumblades 27.

All of the air inlet passageways 26' and 26a in FIG. 7 may have tubes 35connected thereto, or all may open directly to the atmosphere.

What is claimed is:

l. The combination with a carburetor having a barrel defining a borethrough which a fuel mixture may be delivered to an intake manifoldconnected to the carburetor, and means for returning lighter componentsrecovered from exhaust gases to the intake manifold to augment the fuelmixture, of a gasket comprising:

a. a gasket body formed with an opening disposed in registration withthe bore of the barrel so that the fuel mixture will pass therethroughon its way to the manifold;

b. the gasket body having an air inlet passageway leading from a sourceof air to the gasket opening and through which additional air may beconveyed to the carburetor for intermixing with the fuel mixture forleaning down the mixed air-fuel ratio;

c. and a vacuum blade provided on the gasket body adjacent to the airinlet passageway, the blade defining a tip projecting into the gasketbody opening, the blade tip being disposed so that the fuel mixtureflowing over the blade will create a vacuum in the air inlet passagewayfor drawing the additional air into the carburetor that is required bythe returned components to reduce the carbon monoxide readings at idlespeed of an engine and prevent formation of smog.

2. The combination, as set forth in claim 1;

d. and in which the carburetor defines a main body having a throttlevalve assembly body disposed therebeneath, both the gasket body and itsvacuum blade being arranged horizontally and interposed between the mainbody of the carburetor and the throttle valve assembly body.

3. In a gasket with passageway and vacuum blade for introducing air intobarrel of carburetor;

a. a horizontally disposed gasket body formed with an opening thereinmade to be disposed in registration with a bore of a downdraftcarburetor barrel so that fuel mixture will pass therethrough on its wayto an intake manifold;

b. the gasket body having an air inlet passageway formed therein andleading from a source of air to the gasket body opening;

c. a horizontally disposed vacuum blade provided on the gasket body, theblade being disposed adjacent to and above the air inlet passageway anddefining a tip projecting into the gasket body opening so that the fuelmixture flowing over the blade will create a vacuum in the air inletpassageway for drawing additional air into the carburetor;

. and the gasket body being laminated in three layers, the upper andlower layers being made of material forming sealing gaskets, theintermediate layer being made of metal, and the vacuum blade beingformed integral with the intermediate layer.

4. The gasket with passageway and vacuum blade for introducing air intobarrel of carburetor, as set forth in claim 3;

e. and in which the air inlet passageway is formed in the lower layer ofthe gasket body.

HA [HIM

1. The combination with a carburetor having a barrel defining a borethrough which a fuel mixture may be delivered to an intake manifoldconnected to the carburetor, and means for returning lighter componentsrecovered from exhaust gases to the intake manifold to augment the fuelmixture, of a gasket comprising: a. a gasket body formed with an openingdisposed in registration with the bore of the barrel so that the fuelmixture will pass therethrough on its way to the manifold; b. the gasketbody having an air inlet passageway leading from a source of air to thegasket opening and through which additional air may be conveyed to thecarburetor for intermixing with the fuel mixture for leaning down themixed air-fuel ratio; c. and a vacuum blade provided on the gasket bodyadjacent to the air inlet passageway, the blade defining a tipprojecting into the gasket body opening, the blade tip being disposed sothat the fuel mixture flowing over the blade will create a vacuum in theair inlet passageway for drawing the additional air into the carburetorthat is required by the returned components to reduce the carbonmonoxide readings at idle speed of an engine and prevent formation ofsmog.
 2. The combination, as set forth in claim 1; d. and in which thecarburetor defines a main body having a throttle valve assembly bodydisposed therebeneath, both the gasket body and its vacuum blade beingarranged horizontally and interposed between the main body of thecarburetor and the throttle valve assembly body.
 3. In a gasket withpassageway and vacuum blade for introducing air into barrel ofcarburetor; a. a horizontally disposed gasket body formed with anopening therein made to be disposed in registration with a bore of Adowndraft carburetor barrel so that fuel mixture will pass therethroughon its way to an intake manifold; b. the gasket body having an air inletpassageway formed therein and leading from a source of air to the gasketbody opening; c. a horizontally disposed vacuum blade provided on thegasket body, the blade being disposed adjacent to and above the airinlet passageway and defining a tip projecting into the gasket bodyopening so that the fuel mixture flowing over the blade will create avacuum in the air inlet passageway for drawing additional air into thecarburetor; d. and the gasket body being laminated in three layers, theupper and lower layers being made of material forming sealing gaskets,the intermediate layer being made of metal, and the vacuum blade beingformed integral with the intermediate layer.
 4. The gasket withpassageway and vacuum blade for introducing air into barrel ofcarburetor, as set forth in claim 3; e. and in which the air inletpassageway is formed in the lower layer of the gasket body.